In an electric bulb, the filament must retain as much of the heat generated as possible to get very hot and emit light. Tungsten, a strong metal with a high melting point (3380°C), is commonly used for making bulb filaments. ...

Electric laundry irons, electric toasters, electric ovens, electric kettles, and electric heaters are examples of familiar devices that utilize Joule’s heating for their operation.

The heating effect of electric current is harnessed in devices such as electric laundry irons, toasters, ovens, kettles, and heaters. These devices operate based on Joule’s heating, converting electrical energy into heat for specific applications.

The generation of heat in a conductor is undesirable because it represents a conversion of useful electrical energy into heat. In electric circuits, this unavoidable heating can increase the temperature of components, potentially altering their properties.

According to Joule’s law, the heat produced in a resistor is directly proportional to the square of the current. This implies that if the current through a resistor is doubled, the heat produced will increase fourfold.